Improvement jn blowing devices for smoke-stacks



BLNN CONVERSE, 0F ST. JAMES, iiINfESiA.

EMPROVEMENT 5N BLOWENG DEVECES FOR SEVKEnSTACKS.

Specification forming part of Letters Patent Qiii, dated April e, i579; appiieation tiled December 5, 15578.

.To all whom it may concern:

Beit known that I, BLINN CONVERSE, of St. James, in the county ot' qWatonWan and State of Minnesota, have made certain new and useful Improvement-s in Blowing Devices for Smoke-Stacks, which improvements are fully set forth in the following specification and accompanying drawings, in which* Figure l is a sectional side elevation of a portion of the top of `a smokestack with my improvement-s attached thereto; and Fig. 2 is n. plan View ot the same, with a portion ot' the center ot the fan broken out to show interior.

This invention relates to the smoke-stacks ot' steamboilers, more particularly those used on steam tire-engines; and consists in a fanw heel arranged over the top of the staclgand operated by spring or eq uivaientmechanism to not as a blower to forni an artilicial draft when the tiro is tirst started, to accelerate the combustion and reduce the time necessary to raise the steam, as hereinafter set jforth.

In the ordinary arrangement ot' boilers, where the natural motion of the atmosphere is depended upon to blow the fire, some time must elapse before the air in the tiues is sut iciently heated to pass oft', and thns cause a draft through the tire; and in steam 'tire-en gines, where a few seconds of time are frequently so Very important, this is a serious matter; but by attaching' an artificiali. blower to the slack, which ivili cause a strong' draft through the tire-box and tines even betere the tire is started, a great advaiitage will be gained by the saving' ot' valuable time.

To accomplish this I attach to the top ot the smokestacl; A atlaring; bonnet or hood, B, in which a fan-wheel, C, is mounted, and which is connected by gearing and shat'ting a b to a coiled spring, c, in a box, e, upon a frame, D. This spring is provided with a crank or Wheel, E, and ratclietwheel F upon the shaft to which it is secured, and a dog, d, upon the first. gear-Wheel, b, whereby it may be wound up; and gis a dog secured upon the .frame D, in any suitable manner, to mesh into one ot' the teeth of the Wheel b, or in any suit-- able manner upon any other part ofthe mechanism, to hoid the spring after itis Wound up. This dog will be so arranged that by nntripping it the spring Will be released and ab towed to act npon the fan-wheel.

rEhe gears will be speeded up, so that the fan wili be made to revoivc very fast, to increase its effect npc-n the tire.

The frame D Wili be so mounted upon a second frame, G, that the fan-Wheel C and hood B may be turned ofi' to one side, or otherwise removed from over the smoke-stack, after the steam is raised sntiiciently high to employ the steanrbiower or the exhaust from the engine.

The spring may be made of any desired forni or arranged with any desired number of gears or equivalent devices. it may be so arranged thatit maybe rewound While the fan is in motion, so that the fan may be kept in motion a longer time than the length of the spring' xviii ailoiv, and thus' keep up the artiliciai draft for any desired length of time.

r)Che t'an will be made ol' a larger diameter than the smoke-stack, so as to still further increase its power.

A covering, h., will be arranged in the inteA terior ot the hood B around the gearing, to protect it from the heat.

i ain aware that it is not neiv to arrange a fan-wheel in a smokesta-el, as l am aware that, such devices have heretotbre been used; but so t'ar as i. am aware such devices have not been used and operated by mechanical means independently of the motion ot' the atmosphere, either inside or outside ot' the stack or chimney.

Having; thus described my invention, what I claim as new, and desire to secure by Let` ters Patent, is-

The, combination, with a smoke-stack, ot' a fan-Wheei, C, mounted in a Haring movable hood or bonnet, B, pivoted to fra-nie G, and adapted to be removed laterali y from the top of the smoke-stack at pica-sure, substantially as hereinbet'ore set forth.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses,

BLDTN CNVERSE.

Witnesses:

C. N. WooDWARD, J. THORNTON; 

